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In this paper, we present Bit-Sequences (BS), an adaptive cache invalidation algorithm for client/server mobile environments. The algorithm uses adaptable mechanisms to adjust the size of the invalidation report to optimize the use of a limited communication bandwidth while retaining the eeectiveness of cache invalidation. The proposed BS algorithm is(More)
The association between the 10-repeat allele of the dopamine transporter gene (DAT) and attention deficit hyperactivity disorder (ADHD) is uncertain. This study aimed to conduct a meta-analysis of the association between the 10-repeat allele of a variable number tandem repeat (VNTR) polymorphism in the 3'-untranslated region (UTR) of the DAT1 gene and ADHD.(More)
Recent advances in wireless data networking and portable information appliances have engendered a new paradigm of computing, called <italic>mobile computing</italic>, in which users carrying portable devices have access to data and information services regardless of their physical location or movement behavior. In the meantime, research addressing(More)
This research examined factors associated with Internet addiction in adolescence using a population-based cross-sectional survey with self-reported questionnaires. Participants were recruited from high school students, ages 13 to 18 years, registered on the secondary school registry in Guangzhou city using a stratified random sampling technique. Internet(More)
We are witnessing a profound change in the global information infrastructure that has the potential to fundamentally impact many facets of our life. An important aspect of the evolving infrastructure is the seamless, ubiquitous wireless connectivity which engenders continuous interactions between people and interconnected computers. A challenging area of(More)
Time perception deficit has been demonstrated in children with attention deficit hyperactivity disorder (ADHD) by using time production and time reproduction tasks. The impact of motor demand, however, has not yet been fully examined. The current study, which is reported herein, aimed to investigate the pure time perception of Chinese children with ADHD by(More)
In a mobile computing environment, a user carrying a portable computer can execute a mobile transaction by submitting the operations of the transaction to distributed data servers from different locations. The mobility of transaction hosts introduces new issues concerning the efficiency of transaction lock management in the distributed data servers. For(More)
BACKGROUND Alexithymia has been a familiar conception of psychosomatic phenomenon. The aim of this study was to investigate whether there were subtypes of alexithymia associating with different traits of emotional expression and regulation among a group of healthy college students. METHODS 1788 healthy college students were administered with the Chinese(More)
This position paper describes applications that can benefit from integrated mobile computing and workflow management technologies. Such applications empower a mobile workforce to perform coordinated and streamlined work activities in the field or on the road. We discuss characteristics of these applications and workflow management for supporting these(More)